Hydrodynamic separation devices - system and component sizing Hydrodynamic separation devices - system and component sizing

Hydrodynamic separation devices - system and component sizing
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Device	Land use	Downstream BMP (type)	Mechanism enhancement	Sizing calculations	Inlets	Outlets	Openings	Flow diversion structures
Vortechs TM by Contech	Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas1, 2	Filtration, Detention/Infiltration, Rainwater Harvesting3	Yes	Each system custom sized for site one of two ways: to provide a specific removal efficiency of a predefined particle size distribution, or by the Rational Rainfall Method. In most cases, pollutant removal goals can be met with a smaller system configured with an external bypass4, 5	Perpendicular to vault to be tangential to grit chamber to induce swirling flow pattern6	Orientation determined for each system 7	Low flow control orifice sized to submerge inlet pipe when operating at 20%, High flow control weir sized to pass peak system capacity minus peak orifice flow7	Baffle wall, circular grit chamber, flow control chamber, oil chamber8
Continuous Deflective Separation (CDS) R by Contech	Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas8, 9	Filtration, Infiltration, Detention10	Yes	Three primary methods of sizing system: the Water Quality Flow Rate Method to provide a specific removal efficiency of a predefined particle size distribution, the Rational Rainfall Method, or the Probabilistic Method when a specific removal efficiency of net annual sediment load is required11, 12	Grate inlet at street level and pipe inlet (may have multiple), inlet throat area sized to pass flow at surface elevation equal to crest of diversion weir, can be widened to increase capacity13		Diversion weir length and height dimensions determine hydraulic capacity of system13	Diversion chamber, diversion weir, separation chamber, separation screen, oil baffle13
Downstream Defender TM H.I.L. Technology	Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas15, 16	Filtration, Infiltration, Detention, Wetland17	Yes	Q = ciA (runoff coeff. * intensity * area), then see (NJCAT) or refer to sizing calculator from manufacturer (does not require registration) or updated design tool (requires registration)	Tangential to chamber18			Sloping base joined to a benching skirt at a 30-degree angle, dip plate19
First Defense R by Hydro International	Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas19, 20	Filtration, Infiltration, Detention21	Yes	Q = ciA (runoff coeff. * intensity * area), then see Table 1 (NJCAT) or refer to updated design tool from manufacturer (requires registration)	Grate inlet at street level and pipe inlet (may have multiple), max pipe diameter = 18-48 in22	Max pipe diameter = 18-48 in, Min dist from outlet invert to top of rim = 2-3.5 in to 3-6 in depending first on model then on pipe diameter		Built-in bypass, inlet chute22
Stormceptor R by Imbrium or Rinker Materials	Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas23, 24	Filtration and Detention/Retention systems25	Yes	PCSWMM for Stormceptor available from manufacturer for optimal design and sizing purposes (requires registration)	Varies by model	Varies by model	Varies by model	Insert slows water and directs it to lower chamber, non-turbulent treatment chamber with bypass insert25
Barracuda by BaySaver	Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas26, 27	Filtration, Infiltration, Detention28	No	Volume based, treatment chamber capacity ranges from 212 gallons to 7496 gallons29	12 in diameter, variable inlet/outlet angle configurations30, 31	12 in diameter, variable inlet/outlet angle configurations32, 33		Weir prevents inflow from bypassing vortex separator, “teeth” reduce turbulence in sump area, inline may offer internal bypass34, 35
Dual Vortex Separator by OldCastle		Infiltration, Detention, and Retention systems36	Yes	See sizing and selection tool (does not require registration)	Fits 1-3 inlets, see sizing and selection tool for max pipe sizes (does not require registration)			Incoming flow directed into parallel vortex tubes, isolated storage area with baffles36
SciClone TM by BioClean		Filtration, Infiltration, Detention37	Yes		Single outlet	Single outlet		Flow splitter, sump chamber, outlet weir38

Reference links: 1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38